| abstract |
An aqueous cleaning composition includes at least one acid fluoride salt selected from ammonium bifluoride, sodium bifluoride, potassium bifluoride, calcium fluorophosphates, sodium fluorosilicates, and combinations of two or more thereof; at least one mineral acid adduct of urea; at least one surfactant; and at least one organic solvent. The cleaning composition is effective in removing deposited soil and corrosion products on a metal surface, particularly aluminum and aluminum alloy surfaces. |